Well, I am definitely not an expert, but I've read that cracking DVD-A CPPM protection is much harder than cracking CSS (used for DVD-Video)...
You can search the net about it, with a first Google I found this. For sure someone will give you better links.
AFAIK, there is no software allowing the digital copy of a DVD-A yet. But as I say, I'm not an expert and may be wrong.
To be honest, I'll be very happy if someone will tell me "Hey, you are wrong!" :bigsmile: